York JVOHQ Series Installation & Maintenance Manual page 66

Code Classification
01 Indoor Unit
02 The Outdoor Unit
03
04 Communication
04.
05
06 Power Supply
06.
07
Circulatory
System
08
0A Communication
0b
The Outdoor Unit
0C
11
12
13
14
Indoor Unit
Sensor
15
16
17
19 Fan Motor
21
22
23
The Outdoor Unit
Sensor
24
25
29
Table 9.2 Alarm Code
Alarm Content
Indoor protection device action (float
switch)
Outdoor protection device action (high
pressure switch)
Communication between indoor and
outdoor units is abnormal
Communication between the inverter
board and the outdoor PCB is abnormal
Communication between fan control board
and outdoor PCB is abnormal
Power phase anomaly
Inverter voltage is abnormal
Fan control voltage is abnormal
Exhaust superheat TdSH is too low
Exhaust temperature Td (top of
compressor) is too high
Communication abnormal between
outdoor units
The outdoor unit address is incorrect
The main outdoor unit is set incorrectly
Return air thermistor abnormal
Air supply thermistor error
Heat exchanger liquid pipe (anti-freeze)
thermistor abnormal (indoor unit)
Ambient Thermistor Abnormal (Indoor)
Ambient thermistor abnormality (indoor
unit)
Wired controller thermistor exception
(fresh air treatment)
Wired controller built-in thermistor
abnormal (fresh air treatment)
Indoor fan protection device action
High pressure sensor is abnormal
Ambient thermistor abnormality (outdoor
unit)
Compressor top thermistor abnormality
(outdoor unit)
Outdoor exchanger liquid pipe Thermistor
Abnormal
Outdoor heat exchanger / sub cooler gas
side inlet / air side out of the thermistor
abnormalities
Low pressure sensor is abnormal
Water level is too high, drain, or float switch is
abnormal.
Piping clogging, excessive refrigerant, non-
condensable gas mixed
Wrong wiring, loose terminal, disconnected,
outdoor unit power off, outdoor fuse blown
Terminals loose, wire disconnected, outdoor unit
powered off, outdoor unit fuse blows off.
Terminals loose, broken, fuse blown
Power supply error, power phase error, power
wiring phase missing
Outdoor unit voltage is too low, power capacity is
not enough
Outdoor unit voltage is too low, power capacity is
not enough
Excessive refrigerant, expansion valve lock, wiring,
piping connection error, thermistor fault, valve
room - outdoor unit, refrigerant, electrical system
connection error
Insufficient refrigerant, expansion valve lock, wiring,
piping connection error, thermistor fault, valve
room - outdoor unit, refrigerant, electrical system
connection error
Communication wire connection error, wire
disconnected, terminal loosening.
The same system has two sets of the same set of
outdoor unit (slave machine)
There are 2 or more master units in the same
system
Indoor thermistor wiring is wrong, broken, not
connected or shorted.
Indoor fan motor overheats or stuck
Outdoor thermistor wiring is wrong, broken, not
connected or shorted
Outdoor thermistor wiring is wrong, broken, not
connected or shorted.
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Main Reason